Characterizing xBa(Mg1/3Ta2/3)O3+(1-x)Ba(Mg1/3Nb2/3)O3 microwave ceramics using extended x-ray absorption fine structure method

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Title:	Characterizing xBa(Mg_1/3Ta_2/3)O₃+(1-x)Ba(Mg_1/3Nb_2/3)O₃ microwave ceramics using extended x-ray absorption fine structure method
Authors:	Chang, P. J.;Chia, C. T.;Lin, I-nan;Lee, J. F.;Lin, C. M.;Wu, K. T.
Contributors:	淡江大學物理學系
Date:	2006-06
Issue Date:	2009-12-31 10:35:21 (UTC+8)
Publisher:	College Park: American Institute of Physics
Abstract:	The structures of TaO6 and NbO6 oxygen octahedra in xBa(Mg1/3Ta2/3)O3+(1−x)Ba(Mg1/3Nb2/3)O3 perovskite ceramics with x = 0, 0.25, 0.50, 0.75, and 1.0 were investigated by the extended x-ray absorption fine structure method. The decline in the microwave dielectric constant as x increases is caused mainly by the decrease of the mean volume of the oxygen octahedra, regardless of the 1:2 ordered structure and the distortion of the oxygen octahedron. The low Qf values of the TaO6 and NbO6 mixed samples are caused by not only the degrading of the 1:2 ordered structure but also the distortion of oxygen octahedral cages.
Relation:	Applied Physics Letters 88(24), 242907(3pages)
DOI:	10.1063/1.2213514
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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